S5935TFC AMCC [Applied Micro Circuits Corporation], S5935TFC Datasheet - Page 65
S5935TFC
Manufacturer Part Number
S5935TFC
Description
PCI Product
Manufacturer
AMCC [Applied Micro Circuits Corporation]
Datasheet
1.S5935TFC.pdf
(204 pages)
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S5935 – PCI Product
PCI CONTROLLED BUS MASTER READ
TRANSFER COUNT REGISTER (MRTC)
Figure 27. PCI Controlled Bus Master Read Transfer Count Register
AMCC Confidential and Proprietary
Register Name
PCI Address Offset
Power-up value
Attribute
Size
31
00
Master Read Transfer Count
30h
00000000h
Read/Write
32 bits
26
25
The master read transfer count register is used to con-
vey to the PCI controller the actual number of bytes
that are to be transferred. The value in this register is
decremented with each bus master PCI read opera-
tion until the transfer count reaches zero. Upon
reaching zero, the transfer operation ceases and an
interrupt may be optionally generated to either the PCI
or Add-On bus interface. Transfers which are not
whole multiples of DWORDs in size result in a partial
word ending cycle. This partial word ending cycle is
possible since all bus master transfers for this control-
ler are required to begin on a DWORD boundary.
Under certain circumstances, MRTC can be accessed
from the Add-On bus instead of the PCI bus.
Revision 1.02 – June 27, 2006
0
Bit
Value
Transfer Count
in Bytes (R/W)
Reserved = 0's (RO)
Data Book
DS1527
65
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